Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating Activities:
Net income (loss)	$ (3.3)	$ 29.0
Noncash items included in net income (loss):
Depreciation and amortization	111.0	119.5
Noncash equity-based compensation and employee benefits expense	16.9	16.2
Deferred income tax benefit	(4.8)	0.0
(Gains) losses on property disposals, net	3.0	(11.2)
Gain on disposal of equity method investment	0.0	(2.3)
Other noncash items, net	12.5	7.6
Changes in assets and liabilities, net:
Accounts receivable	(78.8)	(49.7)
Accounts payable	12.9	0.8
Other operating assets	11.4	4.1
Other operating liabilities	(16.6)	(28.0)
Net cash provided by operating activities	64.2	86.0
Investing Activities:
Acquisition of property and equipment	(70.8)	(75.4)
Proceeds from disposal of property and equipment	8.2	26.5
Restricted escrow receipts	95.0	112.1
Restricted escrow deposits	(10.0)	(32.9)
Proceeds from disposal of equity method investment, net	0.0	14.6
Net cash provided by investing activities	22.4	44.9
Financing Activities:
Repayments of long-term debt	(48.2)	(26.5)
Debt issuance costs	(14.3)	(1.8)
Net cash used in financing activities	(62.5)	(28.3)
Net Increase In Cash and Cash Equivalents	24.1	102.6
Cash and Cash Equivalents, Beginning of Period	136.7	173.8
Cash and Cash Equivalents, End of Period	160.8	276.4
Supplemental Cash Flow Information:
Interest paid	(78.7)	(68.5)
Income tax refund (payment), net	$ 3.2	$ (4.1)